RESUMO
A prospective study on the refractive changes after horizontal extraocular muscle surgery was conducted involving 51 eyes of 41 subjects. Three variables were measured: axis, cylinder power, and sphere power up to 30 days postoperatively. The behavior and progression of these variables were also evaluated in the postop period Mean changes in axis and cylinder power were found to be significant between the preop and 1 day postop. Mean changes in sphere power were only significant between the 1 day postop and 15 days postop. Mean changes of the three variables between preop and 30 days postop were not significant. The results showed that the effects of horizontal extraocular muscle surgery on the refractive state were only transient and it decreased over time. (Author)